Bit.



PATENTED FEB. 14, 1905.

' w. B. SWAN.

BIT.

APPLICATION FILED IEB.10, 1904.

INVENTOR Patented February 14, 1905.

PATENT OFFICE.

WILLIAM B. SWAN, OF SEYMOUR, CONNECTICUT.

BIT.

SI-ECIFICATION forming part of Letters Patent No. 782,368, datedFebruary 14, 1905.

Application filed February 10, 1904. Serial No. 192,945. v

To all whmn'it may concern:

Be it known that 1. WILLIAM B. SWAN, a resident of Seymour, in thecounty of New Haven and State of Connecticut, have invented certain newand useful Improvements in Bits; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

- My invention relates to an improved bit, the Object of the inventionbeing to provide an improved rapid-boring bit which is so constructed asto cut a smooth hole and rapidly feed itself forward.

With this object in view the invention consists in certain novelfeatures of construction and combinations and arrangement of parts, aswill be more fully hereinafter described, and pointed out in the claim.

In the accompanying drawings, Figure 1 is a view in elevation,illustrating my improvements. Fig. 2 is a similar View taken from theopposite side to that from which Fig. 1

is taken. Fig. 3 is an end .view.

1 represents the shank of my improved bit, the lower portion of whichbeing made spiral, as shown at 2, with flat outer face and roundedinterior. The extreme end of the bit is made with a conical head, asshown at 3, and the cutting edge 4: thereof is curved, forming aforwardly-projecting sharp cutting-tooth 5 i to clear the wood, causinga much smoother hole. The end of the conical portion of the bit isformed into a screw 6 of conical formation and sharp edge, the edge ofthe screw merging into and forming a continuation of the sharp cuttingedge 4, thus facilitating the rapid feeding of the bit into the wood andinsuring a rapid bore.

- Slight changes might be made in the general form and arrangement ofthe parts described without departing from my invention, and hence I donot restrict myself to the precise details set forth, but considermyself at liberty to make such slight changes and alterations as fairlyfall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is v A bit comprising a body portionterminating at its lower end in a conical head, said head having aninwardly-curved cutting edge terminating at its upper end in a tooth,the lower end of said conical head provided with a short screw having aportion which encompasses the apex of the head and extending a shortdistance upwardly from said apex, such short screw forming acontinuation of the said inwardly-curved cutting edge of the conicalhead.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

WM. B. SWAN.

Witnesses:

J. B. MAYNARD, R. N. DEAN.

